Quote:
Originally Posted by cpf240
No.
It adjusts the mixture, does not shutoff fuel.
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If you are running a model B carburetor you should run the GAV closed all the way to the right after warm up . If you are running the Zenith one or two the GAV needs to be opened one quarter turn to the left after warm up. The pot metal replacement carbs sometimes need to run a bit richer depending on the condition of the carburetor . If the engine is running too rich it may may lope at idle and you may see a little rich black smoke out the exhaust . If running too lean the engine may backfire . Running too lean will probably cause more problems than running too rich .